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Prehnite
Prehnite

Powellite
Powellite



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Prehnite
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Prehnite and Powellite Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Greasy, Subadamantine
1.2 Pleochroism
AbsentWalter Schumann
In deeply colored specimens: blue greenAnthony et al
1.3 Dispersion
NoneNA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Translucent
Transparent
1.5 Refractive Index
1.611-1.6731.974-1.984
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Not Available
1.8 Birefringence
0.021-0.033Not Available
Achroite
0 0.296
1.9 Clarity
TranslucentHerve Nicolas Lazzarelli
Transparent

Prehnite and Powellite Optic Character

Prehnite and Powellite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Prehnite and Powellite Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Prehnite and Powellite optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

Prehnite and Powellite Transparency

Similar to their colors, Prehnite and Powellite transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Prehnite is Translucent while Prehnite is Translucent in appearance.